Ndodana Mkhanyisi Tshuma, who also goes by the name of Mark, aged 45 and from Bedford, is believed to have left the country from Heathrow Airport on a British passport on Saturday (4 July). He is a British citizen of Zimbabwean heritage.
Officers from the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit launched a murder investigation on Tuesday (7 July) after the bodies of a woman and two children were discovered at a property in Great Denham.
Although formal identification has yet to take place, police believe them to be his wife Nothabo Zandile Tshuma, 42, known as Zandile, and his daughters Natalie, 15, and Nala, 5.